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An exercise has been carried out to investigate the mechanical and metallurgical effects of skin passing and tension levelling. The investigation was hampered by a lack of suitable cut sheet orders, nevertheless five coils were processed using different levels of skin passing and tension levelling. Full width x 2 m length samples were taken at each processing stage for measurement of shape, gauge profile, surface texture, tensile mechanical properties and formability properties.
The investigation showed that for EDD steel qualities low levels of tension levelling gave a significant improvement in strip shape, but that levels as low as 0.5% increased strip hardness and the 0.2% proof stress and reduced the work hardening coefficient n(1) such that the material may be rendered unsuitable for its intended use.

Additional information

Authors: DE LA RUE T, British Steel plc, Welsh Technology Centre, Port Talbot (GB)
Bibliographic Reference: EUR 15849 EN (1996) 57pp., FS
Availability: Available from the (2)
ISBN: ISBN 92-827-7123-7; ISSN
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